666 EXPERIMENT STATION RECOBD. [Vol. 37 



Notes on some Buprestidae of northern California, W. J. Ohambeblin {Ent. 

 Neios, 28 (1917), Nos. 3, pp. 129-139, flgs. 10; If, pp. 166-169).— These notes, 

 which relate to 61 species, include data on their occurrence and hosts. 



Biological investigation of Sphenophorus callosus, Z. P. Metcalf (North 

 Carolina Sta. Tech. Bui. 13 (1911), pp. 5-123, pi. 1, figs. 68).— Investigations of 

 the southern corn bill bug commenced by the author in the spring of 1912 and 

 carried on until the fall of 1915 are reported in connection with the earlier 

 work by Smith, as previously noted (E. S. R., 29, p. 56). The biologic and 

 economic aspects of the investigation are dealt with, other phases of the problem 

 being left for a later report. Much of the data is presented in tabular form. 



Observations of its biology made in the southwestern part of the State, 

 thought to apply throughout the area of its greatest abundance in North Caro- 

 lina, have been summarized as follows : " The adults hibernate over winter, 

 going into hibernation in late October (October 17 being the latest recorded 

 date). They emerge from hibernation In mid- April (April 10 being the earliest 

 date recorded). Their numbers seem to increase rather rapidly until late 

 May, and after that rather slowly until mid-August. . . . After mid-August the 

 numbers of adults diminish rapidly, so that in early corn practically all the 

 adults have disappeared by the end of August A few adults remain active 

 to late October. 



"The adults commence to lay eggs by early May (May 5 being the earliest 

 recorded date). The number of eggs found in the field increases rather rapidly 

 until mid-June and then less rapidly until mid-July, the number of eggs 

 falling off slightly toward mid-August. After this the number decreases rather 

 rapidly. The latest date recorded for finding eggs in the field Is September 23, 

 but as they were still rather common at that time, it seems safe to conclude 

 that egg laying continues until early October, especially as the adults are 

 active In the fields till late October. 



"The distribution of the larva? throughout the year seems to coincide rather 

 closely with the distribution of the eggs. The earliest larvse have been found 

 in the field In mid-May, but the time of greatest abundance seems to be from 

 late July to mid-August. After this time their numbers fall off rapidly, the 

 latest larvfe being found in late October (larvae In what appeared to be the 

 fourth molt being found on October 27). 



" The earliest pupae have been found in late June. The number Increases 

 rather rapidly till late July and seems to remain nearly constant till late 

 September, the latest pupa being found on November 9. These late-maturing 

 pupae seem to all change to adults before winter, and these adults seem to 

 remain in the pupal cells over winter, not becoming active until the following 

 spring. There is some evidence to show that the early maturing adults lay 

 eggs the same summer that they reach maturity, these eggs hatching and 

 reaching maturity late In the season." 



The following are thought to be the most important factors Involved in any 

 system for tlie control of this pest, both from the standpoint of ease and 

 cheapness of application: (1) Time of planting, (2) rotation of crops, (3) 

 fertilization, (4) drainage, (5) ridging, (6) fall and winter plowing. (7) 

 thorough cultivation, and (8) destruction of native food plants. These in- 

 direct measures are the only means of control, since the habits of the pest 

 make it Impossible to apply direct measures. 



A bibliography of 17 titles is Included. 



An annotated list of the scoljrtid beetles of Oregon, W. J. Chambeblin 

 (Canad. Ent.. 49 (1917), Nos. 9, pp. S21-.t2S; 10, pp. 353-356).— Thia list in- 

 clades descriptions of seven new species. 



